This plugin hasnt been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Featured Image via URL

Description

Featured Image via URL is a plugin to generate the featured image of post from the image url specified.
The image will be fetched back and saved into the Media Library with all supported sizes.
If the featured image is already present, the plugin will do nothing.

This plugin is modified from Auto Post Thumbnail by adityamooley.

For more details, see http://tsai.it/project/wordpress-plugins/featured-image-via-url/